Interesting and balanced article about the study... a lot of the recent "studies" into the healthfulness of vitamin [hormone] D have actually been meta-analyses where there were no double blind controls in place

The article title is an inaccurate reflection of the data collected in the "study."

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“They’re studying the offspring of people who have lived a long time, not the people themselves,” says John White, a vitamin D researcher at McGill University’s physiology department.

Also - and I've mentioned this before - epidemiological studies are flawed in that there are often too many unanswered questions and/or neglected facts to draw fair and accurate conclusions.

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Other researchers however, including Reinhold Vieth, a professor at the University of Toronto’s Nutritional Sciences department who has researched vitamin D since 1974, and Robert Heaney of Creighton University in Omaha, Nebraska, dispute the connection, noting this group may simply have a genetic predisposition toward better health.

No shit! Most people who live beyond the average lifespan ARE naturally healthier than average people.